Starting to Not Care

Starting to feel like I don’t even care about my girlfriend anymore, or some of my other relationships. I’ve split so much on her and so often that now it seems like I’m just, disconnected and barely care. I know that’s my brain trying to protect me, but often it still affects me deep down. She has PSTD from sexual trauma and honestly idk how to handle it, I think about it everyday and feel hyper fixated on it, which causes me to be irritable all the time. She is a good person but our disorders often conflict with each other like my mom has noticed. Everyone loves her but idk, I feel like I’m splitting on her.